The human transport of animals across the Northern Atlantic 



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ber of investigated localities (out of 7) inhabited by a species (Diagr. 3), it appears 

 that the "emigrants" show a higher frequency (average: about 3 localities per 

 species) than the rest (average: about 2 localities per species). — Still more striking 

 is their higher abundance (Diagr. 4). 



The 7 most abundant species in order of precedence, the seven "waste ground" 

 localities (table 5) taken together, are: 



Harpalus affinis 

 Amara aenea 

 Nebria brevicollis 

 Harpalus riifipes 



Acupalpus meridianus 

 Amara plebeja 

 Bembidion lampros 



Number of localities 

 3 U 



DIAGR. 3. Frequency groups of the 64 species of Carabid beetles found on waste 

 ground (A, table 5) on 7 ballast places in SW England. 

 Black = "emigrants". White = non-emigrants. 



